217 results about "Self shielding" patented technology

A guard for a syringe that includes a needle, a needle protector cap, and a barrel with an outer diameter smaller than the needle protector cap. The guard includes a body having a cavity for receiving the syringe therein, and a shield that is slidable between an unguarded position wherein the needle is exposed and a guarded position covering the needle. One or more tabs in a wall of the body are deflectable from a first position wherein the tabs extend along the wall or radially outwardly from the wall, to a second position wherein the tabs are directed inwardly into the cavity for contacting the barrel of the syringe. In other embodiments, a collar or other radial element may be provided on the barrel of the syringe to provide lateral support within the cavity of the body.

Gradient coil assemblies for horizontal magnetic resonance imaging systems (MRIs) and methods of their manufacture. Some embodiments may be used with open MRIs and can be used with an instrument placed in the gap of the MRI. In general, concentrations of conductors or radially oriented conductors may be moved away from the gap of the MRI so as to reduce eddy currents that may be induced in any instrument placed within the gap. Systems for directly cooling primary gradient and shield coils may be utilized and various coil supporting structures may be used to assist in coil alignment or to facilitate use of an instrument in the MRI gap.

The invention discloses a real human body three-dimensional modeling method specific to personalized virtual fitting. According to the method, a video is used as input data; and several steps of feature matching, key frame selection, three-dimensional point cloud generation, template mapping, and texture mapping and the like are carried out to obtain a human body surface three-dimensional model. Because of the motion recovery structure technology, the reconstruction process is substantially simplified, the burdens of the data collection people and the collected people can be reduced, and the requirements on the instrument and equipment are reduced. Meanwhile, a precise reconstruction result can be obtained. A complete human body surface model is obtained based on template mapping; and thus the method has high robustness on the human body texture information missing and self-shielding. Therefore, only a plurality of control points need to be marked manually before template mapping from the data input to model output and other process is completed automatically. The model that is obtained based on reconstruction can be applied to the game and animation design, movie and television special efficacy, and personalized virtual fit and the like.

An antenna useful in an antenna array of a man-portable buried utility locator includes a flexible bobbin made of copper foil. The bobbin has a plurality of axially spaced grooves and an axially extending gap formed therein. A layer of insulation surrounds an outer surface of the bobbin. A conductive wire is disposed in the grooves and wound around the bobbin over the layer of insulation to form a plurality of axially spaced sub-coils. A layer of copper-foil tape having an insulating backing is wound about the conductive wire and has a second gap aligned with the gap in the bobbin. A layer of a low dielectric material is wound about the copper-foil tape. The antenna provides more antenna wire surface for an equivalent coil cross-sectional area, compared to prior art antennas, thus yielding greater sensitivity. The construction of the antenna provides a series of Faraday-shielded sub-coils, which yield a greater useful antenna bandwidth by moving the inherent resonance of each coil to a higher frequency. The construction of the antenna also reduces inherent winding capacitance and provides a self-shielding effect that further improves sensitivity.

A self shielding cored electrode used to form weld beads having high Charpy V-Notch toughness. The cored electrode includes a metal sheath and fill composition. The fill composition includes a slag system having a gas generating compound, magnesium and at least three metals selected from the group consisting of aluminum, cerium, titanium and zirconium.

The presently claimed invention is to provide a package for compact RF signal system, and a method to form the package thereof in order to miniaturize the size of package, improve signal integrity, and reduce manufacturing cost. The package comprises a hybrid substrate with a sandwiched structure, in which the hybrid substrate comprises an upper layer and a lower layer with different dielectric properties being separated by an interposer for improving electrical isolation and mechanical stiffness. Metal layers are formed on the sidewalls of the opening to surround an active component, such that the metal sidewalls together with two ground plates in the upper and lower layers constitute a self-shielding enclosure inside the package to protect the active component.

The method includes following steps: a master ring is selected from more than two EAPS rings contained by EAPS intersecting rings; there is a main station in the master ring; other EAPS rings are defined as slave rings; there is a main station in each slave ring; the setting results above are saved in each station at intersecting point on the EAPS intersecting rings; after the stations at intersecting point detects a fault on sharing route, it transmits alarm notice to the main station on the master ring and the stations on slave rings; after receiving the alarm notice, the main station on master ring makes protection switching, and the slave station makes self shielding for not making protection switching.

The invention discloses a designing method for a gradient coil of a self-shielding superconductive nuclear magnetic resonance imaging system.The designing method comprises the steps that firstly, three-dimensional continuous triangular mesh dividing is performed on a main coil framework region and a shielding coil framework region, and an axial magnetic induction intensity coefficient matrix generated by mesh nodes in the main coil framework region and the shielding coil framework region on a target field point is calculated according to a boundary elements method; secondly, an optimization calculation model is built through a regularization method, wherein the optimization calculation model comprises two parts, the first part is deviation between the axial magnetic induction intensity generated by the mesh nodes in the main coil framework region and the shielding coil framework region on a target field point and the expected target magnetic induction intensity, the second part is the quadratic sum of the flow function curvature of the mesh nodes, and flow function values of the mesh nodes in the main coil framework region and the shielding coil framework region are obtained through solution; lastly, actual winding distribution of the gradient coil is obtained through a flow function method.

A technique for improving the quality factor of an inductor includes increasing a cross-sectional area of the inductor by increasing a vertical dimension associated with the inductor. An apparatus includes an inductor formed partially in a first integrated circuit die and formed partially in at least a second integrated circuit die. The inductor may be formed partially in at least one interconnect structure between the first integrated circuit die and the second integrated circuit die. In at least one embodiment of the invention, the inductor is self-shielding and is configured to generate a magnetic field in response to a current flowing through coupled conductor portions of the self-shielding inductor. The magnetic field of the self-shielding inductor is substantially confined to a core region of the self-shielding inductor.

The invention provides a method for packaging a small RF signal system and for forming packaging so that the packaging size can be minimized, signal integrity can be improved, and manufacturing cost can be lowered. The packaging comprises a mixed substrate with a sandwich structure, wherein the mixed substrate comprises an upper layer and a lower layer, and the upper layer and the lower layer are separated by a plug board and have different dielectric properties so that electrical isolation and mechanical strength can be improved. A metal layer is formed on the side wall of a hole so that an active element can be surrounded, and a self-shielding outer shell in the packaging can be formed by the metal side wall and two earth plates in the upper layer and the lower layer so that the active element can be protected.

The invention provides a method for acquiring a sensitivity coefficient of an important parameter of reactor physical grid computation. The method comprises: 1, establishing a computing model for a specific reactor physical computing problem; 2, adopting a subgroup resonance self-shielding method to perform resonance self-shielding computation, establishing a corresponding generalized conjugate equation for a fast group source term, a resonance energy group source term and a resonance self-shielding section, and solving the generalized conjugate equation to obtain a sensitivity coefficient of a resonance self-shielding section; 3, for an important parameter that needs to be computed, establishing and solving the generalized conjugate equation corresponding to the important parameter, so as to obtain an explicit sensitivity coefficient of the parameter; and 4, combining the sensitivity coefficient of the resonance self-shielding section and the explicit sensitivity coefficient of the resonance self-shielding section to obtain an implicit sensitivity coefficient, wherein a total sensitivity coefficient is equal to the sum of the explicit sensitivity coefficient and the implicit sensitivity coefficient. According to the method provided by the invention, the sensitivity coefficient of any parameter that can be represented as a flux or conjugate flux functional can be obtained quickly; an implicit effect is also considered; and thus the sensitivity coefficient is more accurate.

According to the invention, a magnetic field gradiometer detector for detecting a material of interest positioned in a detecting region outside the detector includes a transmitter for generating an output signal at a selected frequency, a receiver for detecting the signal, a probe, and a switch coupling the receiver and transmitter with the probe that alternately connects and disconnects the receiver and transmitter to the probe, switching between transmitting and receiving. The probe includes tuning elements and a gradiometer coil array. The gradiometer coil array includes a first surface coil and a second surface coil wound in an opposite sense, the probe having a first side and an opposite second side, with the first and second surface coils configured asymmetrically such that the probe projects a magnetic field in the outside detecting region adjacent to the first side while being self-shielded on the second side. Accordingly, the material of interest is detected with increased sensitivity and accuracy in the detecting region with the detector shielded from outside RF sources.

A self-shielding welding electrode and a method of making the same are provided. The self-shielding welding electrode contains rare earth aluminide in either the flux or the electrode portion of the electrode. The self-shielding welding electrode contains at least about 0.5% by weight of the flux of rare earth aluminide.

The invention relates to a design method used for transmitting DC high-temperature superconducting cable body coaxially and bidirectionally, belonging to the field of power system transmission and transformation; the design method comprises the steps as follows: according to the mechanical characteristic and the radius of enwinding framework of the superconducting strips, parameters of the superconducting cable body such as the enwinding helix angle and the enwinding pitch are determined; the magnetic field distribution of all layers of superconducting cable body are determined according to the operation current, thus determining the critical current on all layers of the cable; according to the critical current and the operation redundancy, iterative calculation is carried out for operation current and the magnetic field, thus finally gaining the critical current, best operation current, enwinding layer number and number of the cables. The designed superconducting cable body increases no enwinding process difficulty and achieves bidirectional transmission of DC current; the utilization ratio of the superconducting strip critical current reaches more than 90%; the quantity and low-temperature heat loss of the superconducting cable low-temperature container are respectively reduced by half. The design method has the advantages of large transmission capability, no loss, compact structure, certain current limiting capability, stable mechanical structure, self-shielding, no electromagnetic interference and the like.

An improved guard for a medical cartridge, such as a unit dose pre-filled glass syringe, comprising a body for receiving the cartridge, and a shield slidably attached to the body which are pre-assembled and ready to receive a cartridge therein. The body has a mechanism on a proximal end thereof which holds the cartridge therein. The body and shield have cooperating detents and detent pockets which allow the shield to be directed distally, from an unguarded position in which the needle on the cartridge is uncovered for delivery of medication, to a guarded position in which the needle is permanently covered for disposal. The body may also include a substantially rectangular-shaped finger grip on its proximal end for receiving a similarly shaped proximal flange on the cartridge, whereby the cartridge is received in a predetermined orientation. The body may also include one or more ribs within the cavity for accommodating a cartridge with a large needle cap, such as a 0.5 mL capacity pre-filled syringe. In addition, the guard may include a finger grip plug lockably attachable to the proximal end of the body, and a plunger insertable through the finger grip plug to engage a piston in a cartridge not having its own plunger. The plunger may include a one-way locking member to prevent removal of the plunger from the finger grip plug after assembly.

The invention discloses a gradient coil design method in a nuclear magnetic resonance system. The method comprises the following steps of: establishing a mathematical relation between a field expansion harmonic component and a cylindrical surface current distribution harmonic component under a spherical coordinate system based on a current distribution harmonic component coefficient capable of generating a specific target field through solving; combining the traditional harmonic method with a target field method; and introducing a simulated annealing algorithm to optimize and obtain the global optimum current distribution. The gradient coil design method can be used for designing a self-shielding gradient coil with cylindrical surface current distribution and optionally restraining the coil length, and ensures excellent linearity while the higher coil efficiency is achieved through comprehensively considering a plurality of design indexes. Since the gradient coil design method is optimized by utilizing a global search algorithm-simulated annealing algorithm, a global optimum design result is ensured. Meanwhile the position information of the actual distribution of a current lead is directly output by the design result, therefore, the engineering processing and manufacturing are facilitated.

A system in package (SiP) is disclosed that uses an EMI shield to inhibit EMI or other electrical interference on the components within the SiP. A metal shield may be formed over the SiP. The metal shield may be electrically coupled to a ground layer in a printed circuit board (PCB) to form the EMI shield around the SiP. The substrate of the SiP may include at least some metallization along vertical walls in the end portions of the substrate. The metallization may provide a large contact area for coupling the metal shield to a ground ring coupled to the ground layer in the PCB. The metallization along the vertical walls in the end portions of the substrate may be formed as through-metal vias in a common substrate before singulation to form the SiP.

A wire includes a plurality of carbon nanotube infused fibers in which the infused carbon nanotubes are aligned parallel to the fiber axes. An electromagnetic shield for a wire includes a plurality of carbon nanotube infused fibers, in which the infused carbon nanotubes are aligned radially about the fiber axes. The plurality of carbon nanotube infused fibers are arranged circumferentially about the wire with the fiber axes parallel to the wire. A self-shielded wire includes 1) a wire that includes a plurality of carbon nanotube infused fibers in which the infused carbon nanotubes are aligned parallel to the fiber axes; and 2) an electromagnetic shield that includes a plurality of carbon nanotube infused fibers in which the carbon nanotubes are aligned radially about the fiber axes. The axes of the carbon nanotube infused fibers of the wire and the carbon nanotube infused fibers of the electromagnetic shield share are parallel.

The invention discloses a method for preparing a highlight colored paint plate by using an electron beam radiation curing technology. The method comprises the following steps of: (1) pre-treating a base material: setting the thickness to be 3-50mm, sanding and removing dust; (2) compounding colored paints: preparing an electron beam cured colored paint and preparing an electron beam cured highlight colored paint; (3) performing roller coating and curing: performing accurate roller coating of the electron beam cured colored paint with the coating film thickness of 50-100 microns, and performing radiation curing for 1-2 seconds by using low-energy self-shielding electron beams of which the radiation dose is 50-150kGy; and (4) performing shower coating and curing: performing shower coating of electron beams to cure the highlight colored paint with the coating film thickness of 100-200 microns, and after vacuum coating of a highlight film, performing radiation curing for 1-2 seconds by using the low-energy self-shielding electron beams of which the radiation dose is 50-150kGy. The method has the advantages that the energy consumption is low, the production efficiency is high, the curing speed is high, the processing temperature is low, an inert atmosphere is not needed, a photoinitiator and a photolysis product are not left, and a more environment-friendly effect is achieved.

A welding system and method is disclosed for girth welding high strength materials, including liquefied natural gas storage tanks, using a short arc welding process and a self-shielding electrode. The welding system contains a welding apparatus which advances the self-shielding electrode towards a workpiece to be welded and controls the arc length and the operation of the apparatus so that the weld satisfies the requirements for welding at least American Petroleum Institute Grade X-80 line pipe, or can weld liquefied natural gas storage tanks. The system additionally contains a power source with a controller for creating a current pulse introducing energy into the electrode to melt the end of the self-shielding electrode and a low current quiescent metal transfer section following the end of the melting pulse during which the melted electrode short circuits against the workpiece.

A reactor embedded resonance self-shielding calculation method includes two main steps of 1 calculation based on the resonance section of a one-dimensional fuel lattice cell and 2 embedded iteration calculation based on stationary source calculation and interpolation calculation. The step 1 is executed first to obtain a geometric related resonance section list, the resonance section list is designed according to geometry of the actual reactor fuel lattice cell and is used for replacing a conventional resonance section list in an original multigroup nuclide section database so as to generate an improved multigroup nuclide cross section database, and the step 2 is executed based on the improved multigroup nuclide cross section database to obtain effective resonance self-shielding sections of all regions in a reactor finally; the step 2 is a body of embedded resonance calculation, and the step1 provides a necessary resonance database for the step 2. As transport solution of a single-group stationary source is used for considering influence on the resonance self-shielding effect by reactor inhomogeneous geometry, resonance calculation is embedded into the transport calculation process, and consistency with transport calculation results is achieved.

The invention relates to a miniature underground crawling self-shielding detection robot comprising a molting snake shielding robot and an earth surface auxiliary robot. The molting snake shielding robot can crawl underground, an annular 3D printing nozzle on the side wall sprays adhesive onto the surrounding soil to form a high-strength shield shell, and the molting snake shielding robot carries an electromagnetic probe, a camera, a micro manipulator, a pressure sensor and a temperature sensor and can detect the soil structure of the shallow layer of a planet. The earth surface auxiliary robot follows the molting snake shielding robot to synchronously move on the surface of the earth, uses electromagnetic wave to wirelessly transmit power to the molting snake shielding robot and sends collected data to a space transfer station, and can detect and sample the surface of the earth. By using the miniature underground crawling self-shielding detection robot of the invention, network detection of the shallow layer of a planet can be realized. The robot makes up for the defect of the existing method which can only detect the surface. A complete detected shallow layer soil structure can be provided for engineering geology, engineering survey, planet surface detection and other related fields, and the basic physical and mechanical parameters of the underground rock and soil mass can be obtained.

A surface contamination monitoring system / method configured to correct the detected the radioactive net count rate (NCR) value of a whole-body surface contamination monitoring device based on monitored subject height and thickness is disclosed. The system includes a height detection means for determining the height of a monitored subject and a thickness detection means for determining the thickness of at least a portion of the monitored subject. The net count rate (NCR) is corrected based on the determined height and thickness of the monitored subject as applied to site calibration factor data and self-shielding factor data to produce a corrected net count rate (CNR). If the corrected net count rate (CNR) registers above a preset alarm threshold, the monitored subject is considered contaminated and an appropriate alarm is registered.

The present invention discloses a method for obtaining sensitivity coefficients of an effective multiplication factor to a section under different burnups. The method comprises: 1, performing forward burnup calculation: first, using a subgroup method to calculate an effective self-shielding section of each nuclide, second, using a modular characteristic line method to solve a neutron angle flux density and a neutron conjugate angle flux density, and third, using a chebyshev rational approximation method to calculate a nuclear density of each nuclide; 2, performing conjugate burnup calculation: first, using the chebyshev rational approximation method to calculate an initial conjugate nuclear density of each nuclide, and then calculating a conjugate power, second, using the modular characteristic line method to calculate a generalized neutron transport angle flux and a generalized conjugate neutron transport angle flux, and third, calculating a conjugate initial nuclear density of each nuclide of a next step; and 3, calculating sensitivity coefficients of the section of each nuclide to an effective multiplication factor under different burnups. The method provided by the present invention solves a defect of the existing method that sensitivity coefficients of an effective multiplication factor to a nuclear section under different burnups cannot be accurately and effectively calculated.

The invention provides a brushless double-rotor motor by using a Halbach permanent magnet array and a magnetic field modulation principle. The double-rotor motor comprises four layers which are an inner stator, a modulation ring rotor, an intermediate rotor and an outer stator in sequence from inside to outside in all; the inner stator, the modulation ring rotor and the intermediate rotor form an inner magnetic field modulation-type motor; the intermediate rotor and the outer stator form an outer permanent magnet synchronous motor; and the inner side and the outer side of the intermediate rotor are provided with Halbach array permanent magnets respectively. The modulation ring rotor is connected with an output shaft of an internal combustion engine; and the intermediate rotor is connected with the output shaft of the double-rotor motor. According to the double-rotor motor, the internal and external magnetic field coupling phenomenon of the double-rotor motor is reduced or even eliminated through the magnetic self-shielding characteristic of the Halbach array, the brushless target of the of an inner rotor of the double-rotor motor is achieved through a magnetic field modulation principle to improve the reliability of the motor, and the disadvantages caused by internal and external magnetic field coupling and a carbon brush slip ring are avoided.

The invention relates to a human hand three-dimensional posture estimation method and device based on three-dimensional point cloud which mainly solves the problem of how to recover the three-dimensional posture of a human hand from the human hand point cloud obtained by a single depth map, and has the main technical difficulties of disordered point cloud arrangement, higher noise, rich gesture changes of the human hand, self-shielding of the human hand caused by a shooting angle and the like. The invention provides a human hand posture estimation algorithm based on a deep neural network by which the features can be adaptively extracted from the rich training data. Meanwhile, the local and global features of the point cloud can be predicted while the three-dimensional positions of the joint points of the human hand are regression in real time, the generalization ability of the network is improved through the internal connection of joint labeling, and the problem that the generalizationability of the features extracted by a single-task network is poor, is solved. The actual use verifies that the method and the device have the advantages of high automation degree, high precision andreal-time performance, and can meet the professional or popular application requirements.

The invention discloses a system (200) for irradiation processing a high-energy electron beam having a self-shielding radiation source. The system comprises an irradiation device and a civil building, wherein the irradiation device comprises an accelerator (1), and a shield (22), an accelerator power source and accessory system (5), a power transporting device (4), a scanning box (3), an electron beam drift tube (2), an article conveyer system (7) and a control system (6) which are arranged on the periphery and the top of the accelerator (1). The civil building comprises an irradiating room (1) provided with the scanning box (3), an article sending maze (13), a control room (20) provided with the control system (6) and an accelerator room (21) provided with the accelerator (1). The irradiation processing system (200) is provided with a self-shielding function for the accelerator (1) so as to greatly save the defending cost of the civil building and conveniently assemble and maintain.

The invention discloses a horizontal type self-shielding accelerator. The horizontal type self-shielding accelerator comprises an accelerator high-pressure part steel drum and a beam extraction part steel drum which are connected. A shielding body is connected to the beam extraction part steel drum and internally provided with a vacuum system penetrating through a wall plate of the shielding body to be connected with the beam extraction part steel drum, and the shielding body is internally further provided with a scanning window connected with the vacuum system. An under beam device is arranged in the part, right ahead of the scanning window, of the shielding body and installed on a shielding door of the shielding body. The accelerator is of a horizontal structure, in other words, the accelerator high-pressure part, the beam extraction part and the scanning window are of a horizontal structure, a traditional accelerator is of a vertical type structure, has the high requirement for the height of a workshop and has the characters of being difficult to maintain, troublesome in operation and the like, the full horizontal type structure is adopted, and due to the fact that all devices are arranged on the ground, the horizontal type self-shielding accelerator has the advantages of being simple in structure, convenient to operate and maintain, low in requirement for the height of the workshop and the like.